摘要
从Al ZrOCl2 体系利用熔体直接反应法制备了原位ZrAl3 和Al2 O3 颗粒增强铝基复合材料。Al Zr O体系中原位形成的ZrAl3 具有四方结构 ,其最大尺寸为 4μm ,纵横长度比小于 2 .0。此外 ,还有一定数量的亚微米级Al2 O3 颗粒生成 ,其晶体为六方结构 ,纵横长度比大于 2 .0。ZrAl3(p) ,Al2 O3(p) /Al复合材料凝固组织中 ,随ZrOCl2加入量的增加 ,生成的颗粒尺寸更小 ,分布更均匀。拉伸试验表明 :Al ZrOCl2 体系制备的复合材料具有高的强度和塑性 ,断口组织中存在大量韧窝 ,韧窝中镶嵌着细小颗粒 ,属韧性断裂。
In situ ZrAl 3 and Al 2O 3 particulates reinforced aluminum composites were fabricated by the direct melt reaction (DMR) method from Al ZrOCl 2 system. In situ ZrAl 3 particulates with a tetragonal structure, a length/width ratio lower than 2.0 and a maximum size of 4 μm were formed in the system Al Zr O. In addition, a certain number of submicron Al 2O 3 particles with a hexagonal structure and a length/width ratio larger than 2.0 were also generated in this system. In the microstructure of ZrAl 3 (p) +Al 2O 3 (p) /Al composite, in situ formed particulates are finer and well distributed with the increasing of ZrOCl 2 addition. Tensile tests indicate that composites fabricated by the system Al ZrOCl 2 exhibite high strength and ductility. There are a lot of ripples with fine particulates on the fracture. The fracture of (ZrAl 3+Al 2O 3) p/Al composites belongs with toughness.[
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第1期41-46,共6页
The Chinese Journal of Nonferrous Metals
基金
江苏省应用基础资助!项目 (BJ970 6 2 )
